In recognizing Kenyan Geoffrey Mutai's mark of 2:03:02 at the 2011 Boston Marathon as (at the time) the fastest Marathon ever run, the IAAF has noted: Due to the elevation drop and point-to-point measurements of the Boston course, performances [on that course] are not eligible for World record consideration..
There are three types of embryonic cells; endoderm, mesoderm, and ectoderm. In the human body there are many different types of cells, more than two. They are grouped into tissue types. We have four different tissues; connective, nervous, muscular, and epithelial. The two major groups of cell types in the human body are somatic cells and gamete cells. There are three types of embryonic cells; endoderm, mesoderm, and ectoderm. In the human body there are many different types of cells, more than two. They are grouped into tissue types. We have four different tissues;  connective, nervous, muscular, and epithelial.
There are three types of cells in bone tissue; osteoblasts, osteoclasts and osteocytes. Osteocytes are considered as mature osteoblasts, and they do not secrete bone matrix. The function of the osteocyte is to maintain the metabolism and to exchange nutrients and eliminate wastes.Osteoblasts are the bone forming cells while osteoclasts have the opposite function of osteoblasts.Hence, these two cell types control the rates of formation and breakdown of bone or bone remodeling. Osteoblasts. Osteoblasts are small, mononucleate cells, responsible for bone formation. Osteoblasts promote the formation of bones while osteoclasts promote the bone breakdown. â¢ Osteoblasts become osteocytes, whereas osteoclasts do not. â¢ Osteoblasts are smaller and mononucleate, whereas osteoclasts are larger and multinucleate. Related posts: